body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
}

.header {
    background-color: #2c3e50;
    color: white;
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header a {
    color: white;
    text-decoration: none;
    margin-right: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.section {
    background-color: rgb(220, 220, 220);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.question-title {
    text-align: center;
    font-size: 2em;
    margin-bottom: 20px;
}

.question-text {
    text-align: center;
    margin-bottom: 20px;
}

.button-group {
    text-align: center;
    margin-top: 20px;
}

.btn {
    padding: 10px 20px;
    margin: 0 5px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

.btn-blue {
    background-color: #3498db;
    color: white;
}

.btn-red {
    background-color: #e74c3c;
    color: white;
    margin-top: 20px;
}

.hidden {
    display: none;
}

.footer-button {
    display: block;
    width: 200px;
    margin: 30px auto;
}